Now... My question is this... In such a system is it appropriate to consider the total length and diameter of the nanotube as a cylinder and thus calculate the volume of each tube? In such a system one might take a measure of the total number of nanotubes in the highly aligned array and thus compute a volume which is within an appropriate range.

The reason i ask is that i am attempting to design a composite material which has a high volume of highly aligned SWNT as a constituent component.

For example if i have a SWNT of radius 2nm and length 1 cm (i know that this is exceptionally large) would it be appropriate to assume that it has the volume of a cylinder of equivalent dimensions...